Abstract: The Invention is a supporting holder for portable information terminal device and controller for installation of information terminal device without the limitation of size, which is compact and easily portable. The holder of this invention has the Holder (10) for said device that has short range wireless communication function and it is featured with a pair of arms (11 & 12) with the supporting axis (18) as the fulcrum to hold and remove the said device by clamping. The spacing setting of the front end of said holder is adjustable. Installation Portion is consisted of the Controller (30) to install the said device, in freely mounting and dismounting manner. A pair of arms (11 & 12) can be locked in any angles. Also, the controller (30) is comprised of mounting portion to install and remove the holder (10) freely and operation portion to operate the portable information terminal and short range wireless communication portion have communication by the device.